A kind of sheet-like hydrogel material and preparation method thereof

Abstract

The invention relates to a sheet-like hydrogel material and a preparation method thereof, wherein the sheet-like hydrogel material is composed of the following raw materials according to the percentage of the total weight of the raw materials: polyvinyl alcohol accounts for 4-18%, polyethylene Pyrrolidone accounts for 0-12%, polyethylene oxide accounts for 0-2%, sodium alginate accounts for 0-3%, chitosan accounts for 0-0.5%, xanthan gum accounts for 0-1.5%, sodium polyacrylate accounts for 0-1.5% %, water accounts for 69.99‑93.5%. The preparation method of the sheet-shaped hydrogel material is as follows: heat up the raw material and stir it into a transparent and viscous solution, take it out and cool it down and apply it between two layers of release film, preform it in low temperature refrigeration, form it by electron accelerator radiation, cut it and packed into packages, sterilized by radiation to obtain the sheet-shaped hydrogel material. The hydrogel sheet prepared by this method has high water content, biocompatibility and safety, and the thickness uniformity of the sheet is greatly improved compared with the current technology; the preparation method is simple and easy, and the production efficiency High, low production energy consumption, and can be applied to large-scale production of hydrogel sheets.

Description

technical field [0001] The invention relates to a sheet-like hydrogel material and a preparation method thereof, belonging to the field of chemistry. Background technique [0002] Hydrogel is a kind of polymer compound with a three-dimensional space network structure, which can swell, absorb and release water in large quantities and maintain the original structure and form. Because of its good water retention performance and adjustable mechanical properties, it is widely used in agriculture. , industry, construction, medical care industry and other fields. Hydrogel materials can be synthesized by physical and chemical methods. The spatial grid structure of hydrogels synthesized by physical synthesis method is formed by intermolecular force or entanglement of molecular chains, and its morphology and performance stability are poor at high temperature or other special conditions, which limits its application field. Chemically synthesized hydrogel materials are prepared by add...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the low viscosity and high fluidity of the material liquid, it is not easy to move after the mold is injected with the material liquid;

[0006] 2. Due to the movement and inclination of the mold, the injection molding-radiation process cannot prepare thinner sheets;

[0007] 3. The synthesis time of the freeze-thaw process is long, and the energy consumption is high, resulting in an increase in cost;

[0008] 4. The freeze-thaw process will reduce the transparency of the hydrogel material

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